Line data Source code
1 : /* SPDX-License-Identifier: LGPL-2.1+ */
2 : #pragma once
3 :
4 : #include <alloca.h>
5 : #include <stdbool.h>
6 : #include <stddef.h>
7 :
8 : #include "macro.h"
9 : #include "string-util.h"
10 : #include "strv.h"
11 : #include "time-util.h"
12 :
13 : #define PATH_SPLIT_SBIN_BIN(x) x "sbin:" x "bin"
14 : #define PATH_SPLIT_SBIN_BIN_NULSTR(x) x "sbin\0" x "bin\0"
15 :
16 : #define PATH_NORMAL_SBIN_BIN(x) x "bin"
17 : #define PATH_NORMAL_SBIN_BIN_NULSTR(x) x "bin\0"
18 :
19 : #if HAVE_SPLIT_BIN
20 : # define PATH_SBIN_BIN(x) PATH_SPLIT_SBIN_BIN(x)
21 : # define PATH_SBIN_BIN_NULSTR(x) PATH_SPLIT_SBIN_BIN_NULSTR(x)
22 : #else
23 : # define PATH_SBIN_BIN(x) PATH_NORMAL_SBIN_BIN(x)
24 : # define PATH_SBIN_BIN_NULSTR(x) PATH_NORMAL_SBIN_BIN_NULSTR(x)
25 : #endif
26 :
27 : #define DEFAULT_PATH_NORMAL PATH_SBIN_BIN("/usr/local/") ":" PATH_SBIN_BIN("/usr/")
28 : #define DEFAULT_PATH_NORMAL_NULSTR PATH_SBIN_BIN_NULSTR("/usr/local/") PATH_SBIN_BIN_NULSTR("/usr/")
29 : #define DEFAULT_PATH_SPLIT_USR DEFAULT_PATH_NORMAL ":" PATH_SBIN_BIN("/")
30 : #define DEFAULT_PATH_SPLIT_USR_NULSTR DEFAULT_PATH_NORMAL_NULSTR PATH_SBIN_BIN_NULSTR("/")
31 : #define DEFAULT_PATH_COMPAT PATH_SPLIT_SBIN_BIN("/usr/local/") ":" PATH_SPLIT_SBIN_BIN("/usr/") ":" PATH_SPLIT_SBIN_BIN("/")
32 :
33 : #if HAVE_SPLIT_USR
34 : # define DEFAULT_PATH DEFAULT_PATH_SPLIT_USR
35 : # define DEFAULT_PATH_NULSTR DEFAULT_PATH_SPLIT_USR_NULSTR
36 : #else
37 : # define DEFAULT_PATH DEFAULT_PATH_NORMAL
38 : # define DEFAULT_PATH_NULSTR DEFAULT_PATH_NORMAL_NULSTR
39 : #endif
40 :
41 : bool is_path(const char *p) _pure_;
42 : int path_split_and_make_absolute(const char *p, char ***ret);
43 : bool path_is_absolute(const char *p) _pure_;
44 : char* path_make_absolute(const char *p, const char *prefix);
45 : int safe_getcwd(char **ret);
46 : int path_make_absolute_cwd(const char *p, char **ret);
47 : int path_make_relative(const char *from_dir, const char *to_path, char **_r);
48 : char* path_startswith(const char *path, const char *prefix) _pure_;
49 : int path_compare(const char *a, const char *b) _pure_;
50 : bool path_equal(const char *a, const char *b) _pure_;
51 : bool path_equal_or_files_same(const char *a, const char *b, int flags);
52 : char* path_join_internal(const char *first, ...);
53 : #define path_join(x, ...) path_join_internal(x, __VA_ARGS__, (const char*) -1)
54 :
55 : char* path_simplify(char *path, bool kill_dots);
56 :
57 : enum {
58 : PATH_CHECK_FATAL = 1 << 0, /* If not set, then error message is appended with 'ignoring'. */
59 : PATH_CHECK_ABSOLUTE = 1 << 1,
60 : PATH_CHECK_RELATIVE = 1 << 2,
61 : };
62 :
63 : int path_simplify_and_warn(char *path, unsigned flag, const char *unit, const char *filename, unsigned line, const char *lvalue);
64 :
65 4750 : static inline bool path_equal_ptr(const char *a, const char *b) {
66 4750 : return !!a == !!b && (!a || path_equal(a, b));
67 : }
68 :
69 : /* Note: the search terminates on the first NULL item. */
70 : #define PATH_IN_SET(p, ...) \
71 : ({ \
72 : char **_s; \
73 : bool _found = false; \
74 : STRV_FOREACH(_s, STRV_MAKE(__VA_ARGS__)) \
75 : if (path_equal(p, *_s)) { \
76 : _found = true; \
77 : break; \
78 : } \
79 : _found; \
80 : })
81 :
82 : char* path_startswith_strv(const char *p, char **set);
83 : #define PATH_STARTSWITH_SET(p, ...) path_startswith_strv(p, STRV_MAKE(__VA_ARGS__))
84 :
85 : int path_strv_make_absolute_cwd(char **l);
86 : char** path_strv_resolve(char **l, const char *root);
87 : char** path_strv_resolve_uniq(char **l, const char *root);
88 :
89 : int find_binary(const char *name, char **filename);
90 :
91 : bool paths_check_timestamp(const char* const* paths, usec_t *paths_ts_usec, bool update);
92 :
93 : int fsck_exists(const char *fstype);
94 : int mkfs_exists(const char *fstype);
95 :
96 : /* Iterates through the path prefixes of the specified path, going up
97 : * the tree, to root. Also returns "" (and not "/"!) for the root
98 : * directory. Excludes the specified directory itself */
99 : #define PATH_FOREACH_PREFIX(prefix, path) \
100 : for (char *_slash = ({ \
101 : path_simplify(strcpy(prefix, path), false); \
102 : streq(prefix, "/") ? NULL : strrchr(prefix, '/'); \
103 : }); \
104 : _slash && ((*_slash = 0), true); \
105 : _slash = strrchr((prefix), '/'))
106 :
107 : /* Same as PATH_FOREACH_PREFIX but also includes the specified path itself */
108 : #define PATH_FOREACH_PREFIX_MORE(prefix, path) \
109 : for (char *_slash = ({ \
110 : path_simplify(strcpy(prefix, path), false); \
111 : if (streq(prefix, "/")) \
112 : prefix[0] = 0; \
113 : strrchr(prefix, 0); \
114 : }); \
115 : _slash && ((*_slash = 0), true); \
116 : _slash = strrchr((prefix), '/'))
117 :
118 : /* Similar to path_join(), but only works for two components, and only the first one may be NULL and returns
119 : * an alloca() buffer, or possibly a const pointer into the path parameter. */
120 : #define prefix_roota(root, path) \
121 : ({ \
122 : const char* _path = (path), *_root = (root), *_ret; \
123 : char *_p, *_n; \
124 : size_t _l; \
125 : while (_path[0] == '/' && _path[1] == '/') \
126 : _path ++; \
127 : if (isempty(_root)) \
128 : _ret = _path; \
129 : else { \
130 : _l = strlen(_root) + 1 + strlen(_path) + 1; \
131 : _n = newa(char, _l); \
132 : _p = stpcpy(_n, _root); \
133 : while (_p > _n && _p[-1] == '/') \
134 : _p--; \
135 : if (_path[0] != '/') \
136 : *(_p++) = '/'; \
137 : strcpy(_p, _path); \
138 : _ret = _n; \
139 : } \
140 : _ret; \
141 : })
142 :
143 : int parse_path_argument_and_warn(const char *path, bool suppress_root, char **arg);
144 :
145 : char* dirname_malloc(const char *path);
146 : const char *last_path_component(const char *path);
147 : int path_extract_filename(const char *p, char **ret);
148 :
149 : bool filename_is_valid(const char *p) _pure_;
150 : bool path_is_valid(const char *p) _pure_;
151 : bool path_is_normalized(const char *p) _pure_;
152 :
153 : char *file_in_same_dir(const char *path, const char *filename);
154 :
155 : bool hidden_or_backup_file(const char *filename) _pure_;
156 :
157 : bool is_device_path(const char *path);
158 :
159 : bool valid_device_node_path(const char *path);
160 : bool valid_device_allow_pattern(const char *path);
161 :
162 : int systemd_installation_has_version(const char *root, unsigned minimal_version);
163 :
164 : bool dot_or_dot_dot(const char *path);
165 :
166 36 : static inline const char *skip_dev_prefix(const char *p) {
167 : const char *e;
168 :
169 : /* Drop any /dev prefix if there is any */
170 :
171 36 : e = path_startswith(p, "/dev/");
172 :
173 36 : return e ?: p;
174 : }
175 :
176 : bool empty_or_root(const char *root);
177 18 : static inline const char *empty_to_root(const char *path) {
178 18 : return isempty(path) ? "/" : path;
179 : }
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